21259275

素因数分解:

$3^1\times 5^2\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{163}}^1$

素因数の和:260

約数の個数: 48

約数和(自身を含む): 37092864

約数和(自身を除く): 15833589

約数列:

[1, 3, 5, 15, 25, 37, 47, 75, 111, 141, 163, 185, 235, 489, 555, 705, 815, 925, 1175, 1739, 2445, 2775, 3525, 4075, 5217, 6031, 7661, 8695, 12225, 18093, 22983, 26085, 30155, 38305, 43475, 90465, 114915, 130425, 150775, 191525, 283457, 452325, 574575, 850371, 1417285, 4251855, 7086425, 21259275]

約数ペア:

[(1, 21259275), (3, 7086425), (5, 4251855), (15, 1417285), (25, 850371), (37, 574575), (47, 452325), (75, 283457), (111, 191525), (141, 150775), (163, 130425), (185, 114915), (235, 90465), (489, 43475), (555, 38305), (705, 30155), (815, 26085), (925, 22983), (1175, 18093), (1739, 12225), (2445, 8695), (2775, 7661), (3525, 6031), (4075, 5217)]